Overview
The FPF1321UCX from onsemi is a Dual-Input Single-Output (DISO) load switch, part of the IntelliMAX™ family. This advanced power switch is designed to manage power distribution in low-voltage portable devices. It features two sets of slew-rate controlled, low on-resistance P-channel MOSFET switches and integrated analog features. The device supports seamless power-source transitions between two input power rails using the SEL pin with advanced break-before-make operation. Additionally, it includes true reverse-current blocking (TRCB) to prevent unwanted reverse current from the output to the input during ON/OFF states.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range (VINA, VINB) | 1.5 | 5.5 | V | |
| Maximum Continuous Switch Current per Channel (ISW) | 1.5 | A | ||
| On-Resistance (RON) at VIN = 3.3 V per Channel | 50 | mΩ | ||
| Turn-On Slew Rate for < 1 μF COUT | 130 | μs | ||
| Output Discharge Resistance (FPF1321) | 65 | Ω | ||
| ESD Protection (Human Body Model) | 6 | kV | ||
| Operating and Storage Junction Temperature | -65 | 150 | °C |
Key Features
- Dual-Input Single-Output (DISO) Load Switches
- Input Supply Operating Range: 1.5 V to 5.5 V
- True Reverse-Current Blocking (TRCB)
- Fixed Slew Rate Controlled Turn-On
- Maximum Switch Current: 1.5 A per Channel
- Quick Discharge Feature on FPF1321
- Logic CMOS IO Meets JESD76 Standard for GPIO Interface
- ESD Protected: Human Body Model > 6 kV, Charged Device Model > 1.5 kV
- Pb-Free and Halide Free Devices
Applications
- Smart Phones / Tablet PCs
- Portable Devices
- Near Field Communication (NFC) Capable SIM Card Power Supply
Q & A
- What is the input voltage range of the FPF1321UCX?
The input voltage range is from 1.5 V to 5.5 V.
- What is the maximum continuous switch current per channel?
The maximum continuous switch current per channel is 1.5 A.
- What is the on-resistance of the FPF1321UCX at VIN = 3.3 V?
The on-resistance is typically 50 mΩ per channel.
- Does the FPF1321UCX have ESD protection?
- What is the purpose of the SEL pin in the FPF1321UCX?
The SEL pin controls the input power source selection between VINA and VINB.
- What is the true reverse-current blocking (TRCB) feature?
The TRCB feature blocks unwanted reverse current from the output to the input during both ON and OFF states.
- How does the FPF1321UCX handle power-source transitions?
The device uses an advanced break-before-make control to minimize output voltage drop during power-source transitions.
- What is the recommended output capacitor value for the FPF1321UCX?
A capacitor of at least 1 μF is recommended between the VOUT and GND pins.
- Is the FPF1321UCX Pb-Free and Halide Free?
- What is the package type of the FPF1321UCX?
The device is available in a 1.0 mm x 1.5 mm WLCSP, 6-bump package with a 0.5 mm pitch.
